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- /* $Id: image.c,v 1.13 1999/11/08 07:36:44 brianp Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-
- #ifdef PC_HEADER
- #include "all.h"
- #else
- #ifndef XFree86Server
- #include <assert.h>
- #include <stdlib.h>
- #include <string.h>
- #else
- #include "GL/xf86glx.h"
- #endif
- #include "context.h"
- #include "image.h"
- #include "macros.h"
- #include "mmath.h"
- #include "pixel.h"
- #include "types.h"
- #endif
-
-
-
- /*
- * Flip the 8 bits in each byte of the given array.
- */
- void gl_flip_bytes( GLubyte *p, GLuint n )
- {
- register GLuint i, a, b;
-
- for (i=0;i<n;i++) {
- b = (GLuint) p[i];
- a = ((b & 0x01) << 7) |
- ((b & 0x02) << 5) |
- ((b & 0x04) << 3) |
- ((b & 0x08) << 1) |
- ((b & 0x10) >> 1) |
- ((b & 0x20) >> 3) |
- ((b & 0x40) >> 5) |
- ((b & 0x80) >> 7);
- p[i] = (GLubyte) a;
- }
- }
-
-
- /*
- * Flip the order of the 2 bytes in each word in the given array.
- */
- void gl_swap2( GLushort *p, GLuint n )
- {
- register GLuint i;
-
- for (i=0;i<n;i++) {
- p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
- }
- }
-
-
-
- /*
- * Flip the order of the 4 bytes in each word in the given array.
- */
- void gl_swap4( GLuint *p, GLuint n )
- {
- register GLuint i, a, b;
-
- for (i=0;i<n;i++) {
- b = p[i];
- a = (b >> 24)
- | ((b >> 8) & 0xff00)
- | ((b << 8) & 0xff0000)
- | ((b << 24) & 0xff000000);
- p[i] = a;
- }
- }
-
-
-
-
- /*
- * Return the size, in bytes, of the given GL datatype.
- * Return 0 if GL_BITMAP.
- * Return -1 if invalid type enum.
- */
- GLint gl_sizeof_type( GLenum type )
- {
- switch (type) {
- case GL_BITMAP:
- return 0;
- case GL_UNSIGNED_BYTE:
- return sizeof(GLubyte);
- case GL_BYTE:
- return sizeof(GLbyte);
- case GL_UNSIGNED_SHORT:
- return sizeof(GLushort);
- case GL_SHORT:
- return sizeof(GLshort);
- case GL_UNSIGNED_INT:
- return sizeof(GLuint);
- case GL_INT:
- return sizeof(GLint);
- case GL_FLOAT:
- return sizeof(GLfloat);
- default:
- return -1;
- }
- }
-
-
- /*
- * Same as gl_sizeof_packed_type() but we also accept the
- * packed pixel format datatypes.
- */
- GLint gl_sizeof_packed_type( GLenum type )
- {
- switch (type) {
- case GL_BITMAP:
- return 0;
- case GL_UNSIGNED_BYTE:
- return sizeof(GLubyte);
- case GL_BYTE:
- return sizeof(GLbyte);
- case GL_UNSIGNED_SHORT:
- return sizeof(GLushort);
- case GL_SHORT:
- return sizeof(GLshort);
- case GL_UNSIGNED_INT:
- return sizeof(GLuint);
- case GL_INT:
- return sizeof(GLint);
- case GL_FLOAT:
- return sizeof(GLfloat);
- case GL_UNSIGNED_BYTE_3_3_2:
- return sizeof(GLubyte);
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- return sizeof(GLubyte);
- case GL_UNSIGNED_SHORT_5_6_5:
- return sizeof(GLshort);
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- return sizeof(GLshort);
- case GL_UNSIGNED_SHORT_4_4_4_4:
- return sizeof(GLshort);
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- return sizeof(GLshort);
- case GL_UNSIGNED_SHORT_5_5_5_1:
- return sizeof(GLshort);
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- return sizeof(GLshort);
- case GL_UNSIGNED_INT_8_8_8_8:
- return sizeof(GLuint);
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- return sizeof(GLuint);
- case GL_UNSIGNED_INT_10_10_10_2:
- return sizeof(GLuint);
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- return sizeof(GLuint);
- default:
- return -1;
- }
- }
-
-
-
- /*
- * Return the number of components in a GL enum pixel type.
- * Return -1 if bad format.
- */
- GLint gl_components_in_format( GLenum format )
- {
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_COLOR_INDEX1_EXT:
- case GL_COLOR_INDEX2_EXT:
- case GL_COLOR_INDEX4_EXT:
- case GL_COLOR_INDEX8_EXT:
- case GL_COLOR_INDEX12_EXT:
- case GL_COLOR_INDEX16_EXT:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- case GL_INTENSITY:
- return 1;
- case GL_LUMINANCE_ALPHA:
- return 2;
- case GL_RGB:
- return 3;
- case GL_RGBA:
- return 4;
- case GL_BGR:
- return 3;
- case GL_BGRA:
- return 4;
- case GL_ABGR_EXT:
- return 4;
- default:
- return -1;
- }
- }
-
-
- /*
- * Return bytes per pixel for given format and type
- * Return -1 if bad format or type.
- */
- GLint gl_bytes_per_pixel( GLenum format, GLenum type )
- {
- GLint comps = gl_components_in_format( format );
- if (comps < 0)
- return -1;
-
- switch (type) {
- case GL_BITMAP:
- return 0; /* special case */
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- return comps * sizeof(GLubyte);
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- return comps * sizeof(GLshort);
- case GL_INT:
- case GL_UNSIGNED_INT:
- return comps * sizeof(GLint);
- case GL_FLOAT:
- return comps * sizeof(GLfloat);
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- if (format == GL_RGB || format == GL_BGR)
- return sizeof(GLubyte);
- else
- return -1; /* error */
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (format == GL_RGB || format == GL_BGR)
- return sizeof(GLshort);
- else
- return -1; /* error */
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
- return sizeof(GLushort);
- else
- return -1;
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT)
- return sizeof(GLuint);
- else
- return -1;
- default:
- return -1;
- }
- }
-
-
- /*
- * Test if the given pixel format and type are legal.
- * Return GL_TRUE for legal, GL_FALSE for illegal.
- */
- GLboolean gl_is_legal_format_and_type( GLenum format, GLenum type )
- {
- switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- switch (type) {
- case GL_BITMAP:
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_DEPTH_COMPONENT:
- case GL_BGR:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
- case GL_RGB:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
- case GL_RGBA:
- case GL_BGRA:
- case GL_ABGR_EXT:
- switch (type) {
- case GL_BYTE:
- case GL_UNSIGNED_BYTE:
- case GL_SHORT:
- case GL_UNSIGNED_SHORT:
- case GL_INT:
- case GL_UNSIGNED_INT:
- case GL_FLOAT:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- return GL_TRUE;
- default:
- return GL_FALSE;
- }
- default:
- ; /* fall-through */
- }
- return GL_FALSE;
- }
-
-
-
- /*
- * Return the address of a pixel in an image (actually a volume).
- * Pixel unpacking/packing parameters are observed according to 'packing'.
- * Input: image - start of image data
- * width, height - size of image
- * format - image format
- * type - pixel component type
- * packing - the pixelstore attributes
- * img - which image in the volume (0 for 1D or 2D images)
- * row, column - location of pixel in the image
- * Return: address of pixel at (image,row,column) in image or NULL if error.
- */
- GLvoid *gl_pixel_addr_in_image( const struct gl_pixelstore_attrib *packing,
- const GLvoid *image, GLsizei width,
- GLsizei height, GLenum format, GLenum type,
- GLint img, GLint row, GLint column )
- {
- GLint alignment; /* 1, 2 or 4 */
- GLint pixels_per_row;
- GLint rows_per_image;
- GLint skiprows;
- GLint skippixels;
- GLint skipimages; /* for 3-D volume images */
- GLubyte *pixel_addr;
-
- alignment = packing->Alignment;
- if (packing->RowLength > 0) {
- pixels_per_row = packing->RowLength;
- }
- else {
- pixels_per_row = width;
- }
- if (packing->ImageHeight > 0) {
- rows_per_image = packing->ImageHeight;
- }
- else {
- rows_per_image = height;
- }
- skiprows = packing->SkipRows;
- skippixels = packing->SkipPixels;
- skipimages = packing->SkipImages;
-
- if (type==GL_BITMAP) {
- /* BITMAP data */
- GLint comp_per_pixel; /* components per pixel */
- GLint bytes_per_comp; /* bytes per component */
- GLint bytes_per_row;
- GLint bytes_per_image;
-
- /* Compute bytes per component */
- bytes_per_comp = gl_sizeof_packed_type( type );
- if (bytes_per_comp<0) {
- return NULL;
- }
-
- /* Compute number of components per pixel */
- comp_per_pixel = gl_components_in_format( format );
- if (comp_per_pixel<0 && type != GL_BITMAP) {
- return NULL;
- }
-
- bytes_per_row = alignment
- * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
-
- bytes_per_image = bytes_per_row * rows_per_image;
-
- pixel_addr = (GLubyte *) image
- + (skipimages + img) * bytes_per_image
- + (skiprows + row) * bytes_per_row
- + (skippixels + column) / 8;
- }
- else {
- /* Non-BITMAP data */
- GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
-
- bytes_per_pixel = gl_bytes_per_pixel( format, type );
-
- /* The pixel type and format should have been error checked earlier */
- assert(bytes_per_pixel > 0);
-
- bytes_per_row = pixels_per_row * bytes_per_pixel;
- remainder = bytes_per_row % alignment;
- if (remainder > 0)
- bytes_per_row += (alignment - remainder);
-
- ASSERT(bytes_per_row % alignment == 0);
-
- bytes_per_image = bytes_per_row * rows_per_image;
-
- /* compute final pixel address */
- pixel_addr = (GLubyte *) image
- + (skipimages + img) * bytes_per_image
- + (skiprows + row) * bytes_per_row
- + (skippixels + column) * bytes_per_pixel;
- }
-
- return (GLvoid *) pixel_addr;
- }
-
-
-
- /*
- * Allocate a new gl_image. All fields are initialized to zero.
- */
- static struct gl_image *alloc_image( void )
- {
- return CALLOC_STRUCT(gl_image);
- }
-
-
-
- /*
- * Allocate a new gl_image with the error flag set.
- */
- static struct gl_image *alloc_error_image( GLint width, GLint height,
- GLint depth, GLenum format,
- GLenum type )
- {
- struct gl_image *image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = depth;
- image->Format = format;
- image->Type = type;
- image->ErrorFlag = GL_TRUE;
- }
- return image;
- }
-
-
-
- /*
- * Free a gl_image.
- */
- void gl_free_image( struct gl_image *image )
- {
- if (image->Data) {
- FREE(image->Data);
- }
- FREE(image);
- }
-
-
-
- /*
- * Do error checking on an image. If there's an error, register it and
- * return GL_TRUE, else return GL_FALSE.
- */
- GLboolean gl_image_error_test( GLcontext *ctx, const struct gl_image *image,
- const char *msg )
- {
- if (!image) {
- gl_error( ctx, GL_OUT_OF_MEMORY, msg );
- return GL_TRUE;
- }
- if (image->Width <= 0 || image->Height <= 0 || image->Depth <= 0) {
- gl_error( ctx, GL_INVALID_VALUE, msg );
- return GL_TRUE;
- }
- else if (!gl_is_legal_format_and_type(image->Format, image->Type)) {
- return GL_TRUE;
- }
- else {
- return GL_FALSE;
- }
- }
-
-
-
- /*
- * Unpack a depth-buffer image storing values as GLshort, GLuint, or GLfloats.
- * Input: type - datatype of src depth image
- * Return pointer to a new gl_image structure.
- *
- * Notes: if the source image type is GLushort then the gl_image will
- * also store GLushorts. If the src image type is GLuint then the gl_image
- * will also store GLuints. For all other src image types the gl_image
- * will store GLfloats. The integer cases can later be optimized.
- */
- static struct gl_image *
- unpack_depth_image( GLcontext *ctx, GLenum type, GLint width, GLint height,
- const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing)
-
- {
- struct gl_image *image;
- GLfloat *fDst;
- GLushort *sDst;
- GLuint *iDst;
- GLint i, j;
- GLboolean errorType;
-
- errorType = type != GL_BYTE &&
- type != GL_UNSIGNED_BYTE &&
- type != GL_SHORT &&
- type != GL_UNSIGNED_SHORT &&
- type != GL_INT &&
- type != GL_UNSIGNED_INT &&
- type != GL_FLOAT;
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = 1;
- image->Components = 1;
- image->Format = GL_DEPTH_COMPONENT;
- if (errorType) {
- image->Type = type;
- image->Data = NULL;
- }
- if (type==GL_UNSIGNED_SHORT) {
- image->Type = GL_UNSIGNED_SHORT;
- image->Data = MALLOC( width * height * sizeof(GLushort));
- }
- else if (type==GL_UNSIGNED_INT) {
- image->Type = GL_UNSIGNED_INT;
- image->Data = MALLOC( width * height * sizeof(GLuint));
- }
- else {
- image->Type = GL_FLOAT;
- image->Data = MALLOC( width * height * sizeof(GLfloat));
- }
- image->RefCount = 0;
- if (!image->Data)
- return image;
- }
- else {
- return NULL;
- }
-
- if (errorType)
- return image;
-
- fDst = (GLfloat *) image->Data;
- sDst = (GLushort *) image->Data;
- iDst = (GLuint *) image->Data;
-
- for (i=0;i<height;i++) {
- GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
- width, height,
- GL_DEPTH_COMPONENT, type,
- 0, i, 0 );
- if (!src) {
- return image;
- }
-
- switch (type) {
- case GL_BYTE:
- assert(image->Type == GL_FLOAT);
- for (j=0; j<width; j++) {
- *fDst++ = BYTE_TO_FLOAT(((GLbyte*)src)[j]);
- }
- break;
- case GL_UNSIGNED_BYTE:
- assert(image->Type == GL_FLOAT);
- for (j=0; j<width; j++) {
- *fDst++ = UBYTE_TO_FLOAT(((GLubyte*)src)[j]);
- }
- break;
- case GL_UNSIGNED_SHORT:
- assert(image->Type == GL_UNSIGNED_SHORT);
- MEMCPY( sDst, src, width * sizeof(GLushort) );
- if (packing->SwapBytes) {
- gl_swap2( sDst, width );
- }
- sDst += width;
- break;
- case GL_SHORT:
- assert(image->Type == GL_FLOAT);
- if (packing->SwapBytes) {
- for (j=0;j<width;j++) {
- GLshort value = ((GLshort*)src)[j];
- value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
- *fDst++ = SHORT_TO_FLOAT(value);
- }
- }
- else {
- for (j=0;j<width;j++) {
- *fDst++ = SHORT_TO_FLOAT(((GLshort*)src)[j]);
- }
- }
- break;
- case GL_INT:
- assert(image->Type == GL_FLOAT);
- if (packing->SwapBytes) {
- for (j=0;j<width;j++) {
- GLint value = ((GLint*)src)[j];
- value = ((value >> 24) & 0x000000ff) |
- ((value >> 8) & 0x0000ff00) |
- ((value << 8) & 0x00ff0000) |
- ((value << 24) & 0xff000000);
- *fDst++ = INT_TO_FLOAT(value);
- }
- }
- else {
- for (j=0;j<width;j++) {
- *fDst++ = INT_TO_FLOAT(((GLint*)src)[j]);
- }
- }
- iDst += width;
- break;
- case GL_UNSIGNED_INT:
- assert(image->Type == GL_UNSIGNED_INT);
- MEMCPY( iDst, src, width * sizeof(GLuint) );
- if (packing->SwapBytes) {
- gl_swap4( iDst, width );
- }
- iDst += width;
- break;
- case GL_FLOAT:
- assert(image->Type == GL_FLOAT);
- MEMCPY( fDst, src, width * sizeof(GLfloat) );
- if (packing->SwapBytes) {
- gl_swap4( (GLuint*) fDst, width );
- }
- fDst += width;
- break;
- default:
- gl_problem(ctx, "unpack_depth_image type" );
- return image;
- }
- }
-
- return image;
- }
-
-
-
- /*
- * Unpack a stencil image. Store as GLubytes in a gl_image structure.
- * Return: pointer to new gl_image structure.
- */
- static struct gl_image *
- unpack_stencil_image( GLcontext *ctx, GLenum type, GLint width, GLint height,
- const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
- {
- struct gl_image *image;
- GLubyte *dst;
- GLint i, j;
- GLboolean errorType;
-
- assert(sizeof(GLstencil) == sizeof(GLubyte));
-
- errorType = type != GL_BYTE &&
- type != GL_UNSIGNED_BYTE &&
- type != GL_SHORT &&
- type != GL_UNSIGNED_SHORT &&
- type != GL_INT &&
- type != GL_UNSIGNED_INT &&
- type != GL_FLOAT &&
- type != GL_BITMAP;
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = 1;
- image->Components = 1;
- image->Format = GL_STENCIL_INDEX;
- if (errorType) {
- image->Type = type;
- image->Data = NULL;
- }
- else {
- image->Type = GL_UNSIGNED_BYTE;
- image->Data = MALLOC( width * height * sizeof(GLubyte));
- }
- image->RefCount = 0;
- if (!image->Data)
- return image;
- }
- else {
- return NULL;
- }
-
- if (errorType)
- return image; /* error will be generated later */
-
- dst = (GLubyte *) image->Data;
-
- for (i=0;i<height;i++) {
- GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
- width, height,
- GL_STENCIL_INDEX, type,
- 0, i, 0 );
- if (!src) {
- return image;
- }
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- case GL_BYTE:
- MEMCPY( dst, src, width * sizeof(GLubyte) );
- dst += width * sizeof(GLubyte);
- break;
- case GL_UNSIGNED_SHORT:
- case GL_SHORT:
- if (packing->SwapBytes) {
- /* grab upper byte */
- for (j=0; j < width; j++) {
- *dst++ = (((GLushort*)src)[j] & 0xff00) >> 8;
- }
- }
- else {
- for (j=0; j < width; j++) {
- *dst++ = (((GLushort*)src)[j]) & 0xff;
- }
- }
- break;
- case GL_INT:
- if (packing->SwapBytes) {
- /* grab upper byte */
- for (j=0; j < width; j++) {
- *dst++ = (((GLuint*)src)[j] & 0xff000000) >> 8;
- }
- }
- else {
- for (j=0; j < width; j++) {
- *dst++ = (((GLuint*)src)[j]) & 0xff;
- }
- }
- break;
- case GL_UNSIGNED_INT:
- if (packing->SwapBytes) {
- /* grab upper byte */
- for (j=0; j < width; j++) {
- *dst++ = (((GLuint*)src)[j] & 0xff000000) >> 8;
- }
- }
- else {
- for (j=0; j < width; j++) {
- *dst++ = (((GLuint*)src)[j]) & 0xff;
- }
- }
- break;
- case GL_FLOAT:
- if (packing->SwapBytes) {
- for (j=0; j < width; j++) {
- GLfloat fvalue;
- GLint value = ((GLuint*)src)[j];
- value = ((value & 0xff000000) >> 24)
- | ((value & 0x00ff0000) >> 8)
- | ((value & 0x0000ff00) << 8)
- | ((value & 0x000000ff) << 24);
- fvalue = *((GLfloat*) &value);
- *dst++ = ((GLint) fvalue) & 0xff;
- }
- }
- else {
- for (j=0; j < width; j++) {
- GLfloat fvalue = ((GLfloat *)src)[j];
- *dst++ = ((GLint) fvalue) & 0xff;
- }
- }
- break;
- default:
- gl_problem(ctx, "unpack_stencil_image type" );
- return image;
- }
- }
-
- return image;
- }
-
-
-
- /*
- * Unpack a bitmap, return a new gl_image struct.
- */
- static struct gl_image *
- unpack_bitmap( GLenum format, GLint width, GLint height,
- const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
- {
- struct gl_image *image;
- GLint bytes, i, width_in_bytes;
- GLubyte *buffer, *dst;
-
- assert(format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX);
-
- /* Alloc dest storage */
- bytes = ((width+7)/8 * height);
- if (bytes>0 && pixels!=NULL) {
- buffer = (GLubyte *) MALLOC( bytes );
- if (!buffer) {
- return NULL;
- }
- /* Copy/unpack pixel data to buffer */
- width_in_bytes = CEILING( width, 8 );
- dst = buffer;
- for (i=0; i<height; i++) {
- GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
- width, height,
- GL_COLOR_INDEX, GL_BITMAP,
- 0, i, 0 );
- if (!src) {
- FREE(buffer);
- return NULL;
- }
- MEMCPY( dst, src, width_in_bytes );
- dst += width_in_bytes;
- }
- /* Bit flipping */
- if (packing->LsbFirst) {
- gl_flip_bytes( buffer, bytes );
- }
- }
- else {
- /* a 'null' bitmap */
- buffer = NULL;
- }
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = 1;
- image->Components = 0;
- image->Format = format;
- image->Type = GL_BITMAP;
- image->Data = buffer;
- image->RefCount = 0;
- }
- else {
- FREE( buffer );
- return NULL;
- }
-
- return image;
- }
-
-
-
- /*
- * Unpack a 32x32 pixel polygon stipple from user memory using the
- * current pixel unpack settings.
- */
- void gl_unpack_polygon_stipple( const GLcontext *ctx,
- const GLubyte *pattern, GLuint dest[32] )
- {
- GLint i;
- for (i = 0; i < 32; i++) {
- GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( &ctx->Unpack, pattern,
- 32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 );
- dest[i] = (src[0] << 24)
- | (src[1] << 16)
- | (src[2] << 8)
- | (src[3] );
- }
-
- /* Bit flipping within each byte */
- if (ctx->Unpack.LsbFirst) {
- gl_flip_bytes( (GLubyte *) dest, 32 * 4 );
- }
- }
-
-
-
- /*
- * Pack polygon stipple into user memory given current pixel packing
- * settings.
- */
- void gl_pack_polygon_stipple( const GLcontext *ctx,
- const GLuint pattern[32],
- GLubyte *dest )
- {
- GLint i;
- for (i = 0; i < 32; i++) {
- GLubyte *dst = (GLubyte *) gl_pixel_addr_in_image( &ctx->Pack, dest,
- 32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 );
- dst[0] = (pattern[i] >> 24) & 0xff;
- dst[1] = (pattern[i] >> 16) & 0xff;
- dst[2] = (pattern[i] >> 8) & 0xff;
- dst[3] = (pattern[i] ) & 0xff;
-
- /* Bit flipping within each byte */
- if (ctx->Pack.LsbFirst) {
- gl_flip_bytes( (GLubyte *) dst, 4 );
- }
- }
- }
-
-
-
- /*
- * Unpack an RGBA or CI image and store it as unsigned bytes
- */
- static struct gl_image *
- unpack_ubyte_image( GLint width, GLint height,
- GLint depth, GLenum format, const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
- {
- struct gl_image *image;
- GLint width_in_bytes;
- GLint components;
- GLubyte *buffer, *dst;
- GLint i, d;
-
- components = gl_components_in_format( format );
-
- width_in_bytes = width * components * sizeof(GLubyte);
- buffer = (GLubyte *) MALLOC( height * width_in_bytes * depth );
- if (!buffer) {
- return NULL;
- }
-
- /* Copy/unpack pixel data to buffer */
- dst = buffer;
- for (d=0; d<depth; d++ ) {
- for (i=0;i<height;i++) {
- GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( packing,
- pixels, width, height, format, GL_UNSIGNED_BYTE,
- d, i, 0 );
- if (!src) {
- FREE(buffer);
- return NULL;
- }
- MEMCPY( dst, src, width_in_bytes );
- dst += width_in_bytes;
- }
- }
-
- if (format == GL_BGR) {
- /* swap order of every ubyte triplet from BGR to RGB */
- for (i=0; i<width*height; i++) {
- GLubyte b = buffer[i*3+0];
- GLubyte r = buffer[i*3+2];
- buffer[i*3+0] = r;
- buffer[i*3+2] = b;
- }
- }
- else if (format == GL_BGRA) {
- /* swap order of every ubyte quadruplet from BGRA to RGBA */
- for (i=0; i<width*height; i++) {
- GLubyte b = buffer[i*4+0];
- GLubyte r = buffer[i*4+2];
- buffer[i*4+0] = r;
- buffer[i*4+2] = b;
- }
- }
- else if (format == GL_ABGR_EXT) {
- /* swap order of every ubyte quadruplet from ABGR to RGBA */
- for (i=0; i<width*height; i++) {
- GLubyte a = buffer[i*4+0];
- GLubyte b = buffer[i*4+1];
- GLubyte g = buffer[i*4+2];
- GLubyte r = buffer[i*4+3];
- buffer[i*4+0] = r;
- buffer[i*4+1] = g;
- buffer[i*4+2] = b;
- buffer[i*4+3] = a;
- }
- }
-
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = depth;
- image->Components = components;
- if (format == GL_BGR)
- image->Format = GL_RGB;
- else if (format == GL_BGRA)
- image->Format = GL_RGBA;
- else if (format == GL_ABGR_EXT)
- image->Format = GL_RGBA;
- else
- image->Format = format;
- image->Type = GL_UNSIGNED_BYTE;
- image->Data = buffer;
- image->RefCount = 0;
- }
- else {
- FREE( buffer );
- }
-
- return image;
- }
-
-
-
- /*
- * Unpack a color image storing image as GLfloats
- */
- static struct gl_image *
- unpack_float_image( GLcontext *ctx, GLint width, GLint height, GLint depth,
- GLenum format, GLenum type, const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
- {
- struct gl_image *image;
- GLfloat *dst;
- GLint elems_per_row;
- GLint components;
- GLint i, j, d;
- GLboolean normalize;
-
- assert(type != GL_BITMAP);
-
- components = gl_components_in_format( format );
- assert(components > 0); /* should have been caught earlier */
-
- if (!gl_is_legal_format_and_type( format, type )) {
- /* bad pixel type for format, make dummy image */
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = depth;
- image->Components = components;
- image->Format = format;
- image->Type = type;
- image->Data = NULL;
- image->RefCount = 0;
- }
- return image;
- }
-
- elems_per_row = width * components;
-
- image = alloc_image();
- if (image) {
- image->Width = width;
- image->Height = height;
- image->Depth = depth;
- image->Components = components;
- if (format == GL_BGR)
- image->Format = GL_RGB;
- else if (format == GL_BGRA)
- image->Format = GL_RGBA;
- else if (format == GL_ABGR_EXT)
- image->Format = GL_RGBA;
- else
- image->Format = format;
- image->Type = GL_FLOAT;
- image->Data = MALLOC( elems_per_row * height * depth * sizeof(GLfloat));
- image->RefCount = 0;
- if (!image->Data)
- return image;
- }
- else {
- return NULL;
- }
-
- normalize = (format != GL_COLOR_INDEX) && (format != GL_STENCIL_INDEX);
-
- dst = (GLfloat *) image->Data;
-
- for (d=0; d<depth; d++) {
- for (i=0;i<height;i++) {
- GLvoid *src = gl_pixel_addr_in_image( packing, pixels,
- width, height,
- format, type,
- d, i, 0 );
- if (!src) {
- return image;
- }
-
- switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *ubsrc = (GLubyte *) src;
- if (normalize) {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = UBYTE_TO_FLOAT(ubsrc[j]);
- }
- }
- else {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = (GLfloat) ubsrc[j];
- }
- }
- }
- break;
- case GL_BYTE:
- if (normalize) {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = BYTE_TO_FLOAT(((GLbyte*)src)[j]);
- }
- }
- else {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = (GLfloat) ((GLbyte*)src)[j];
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- if (packing->SwapBytes) {
- for (j=0;j<elems_per_row;j++) {
- GLushort value = ((GLushort*)src)[j];
- value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
- if (normalize) {
- *dst++ = USHORT_TO_FLOAT(value);
- }
- else {
- *dst++ = (GLfloat) value;
- }
- }
- }
- else {
- if (normalize) {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = USHORT_TO_FLOAT(((GLushort*)src)[j]);
- }
- }
- else {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = (GLfloat) ((GLushort*)src)[j];
- }
- }
- }
- break;
- case GL_SHORT:
- if (packing->SwapBytes) {
- for (j=0;j<elems_per_row;j++) {
- GLshort value = ((GLshort*)src)[j];
- value = ((value >> 8) & 0xff) | ((value&0xff) << 8);
- if (normalize) {
- *dst++ = SHORT_TO_FLOAT(value);
- }
- else {
- *dst++ = (GLfloat) value;
- }
- }
- }
- else {
- if (normalize) {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = SHORT_TO_FLOAT(((GLshort*)src)[j]);
- }
- }
- else {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = (GLfloat) ((GLshort*)src)[j];
- }
- }
- }
- break;
- case GL_UNSIGNED_INT:
- if (packing->SwapBytes) {
- GLuint value;
- for (j=0;j<elems_per_row;j++) {
- value = ((GLuint*)src)[j];
- value = ((value & 0xff000000) >> 24)
- | ((value & 0x00ff0000) >> 8)
- | ((value & 0x0000ff00) << 8)
- | ((value & 0x000000ff) << 24);
- if (normalize) {
- *dst++ = UINT_TO_FLOAT(value);
- }
- else {
- *dst++ = (GLfloat) value;
- }
- }
- }
- else {
- if (normalize) {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = UINT_TO_FLOAT(((GLuint*)src)[j]);
- }
- }
- else {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = (GLfloat) ((GLuint*)src)[j];
- }
- }
- }
- break;
- case GL_INT:
- if (packing->SwapBytes) {
- GLint value;
- for (j=0;j<elems_per_row;j++) {
- value = ((GLint*)src)[j];
- value = ((value & 0xff000000) >> 24)
- | ((value & 0x00ff0000) >> 8)
- | ((value & 0x0000ff00) << 8)
- | ((value & 0x000000ff) << 24);
- if (normalize) {
- *dst++ = INT_TO_FLOAT(value);
- }
- else {
- *dst++ = (GLfloat) value;
- }
- }
- }
- else {
- if (normalize) {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = INT_TO_FLOAT(((GLint*)src)[j]);
- }
- }
- else {
- for (j=0;j<elems_per_row;j++) {
- *dst++ = (GLfloat) ((GLint*)src)[j];
- }
- }
- }
- break;
- case GL_FLOAT:
- if (packing->SwapBytes) {
- GLint value;
- for (j=0;j<elems_per_row;j++) {
- value = ((GLuint*)src)[j];
- value = ((value & 0xff000000) >> 24)
- | ((value & 0x00ff0000) >> 8)
- | ((value & 0x0000ff00) << 8)
- | ((value & 0x000000ff) << 24);
- *dst++ = *((GLfloat*) &value);
- }
- }
- else {
- MEMCPY( dst, src, elems_per_row*sizeof(GLfloat) );
- dst += elems_per_row;
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- {
- GLubyte *ubsrc = (GLubyte *) src;
- for (j=0;j<width;j++) {
- GLubyte p = ubsrc[j];
- *dst++ = ((p >> 5) ) * (1.0F / 7.0F); /* red */
- *dst++ = ((p >> 2) & 0x7) * (1.0F / 7.0F); /* green */
- *dst++ = ((p ) & 0x3) * (1.0F / 3.0F); /* blue */
- }
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- {
- GLubyte *ubsrc = (GLubyte *) src;
- for (j=0;j<width;j++) {
- GLubyte p = ubsrc[j];
- *dst++ = ((p ) & 0x7) * (1.0F / 7.0F); /* red */
- *dst++ = ((p >> 3) & 0x7) * (1.0F / 7.0F); /* green */
- *dst++ = ((p >> 6) ) * (1.0F / 3.0F); /* blue */
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- {
- GLushort *ussrc = (GLushort *) src;
- for (j=0;j<width;j++) {
- GLushort p = ussrc[j];
- *dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* red */
- *dst++ = ((p >> 5) & 0x3f) * (1.0F / 63.0F); /* green */
- *dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* blue */
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- {
- GLushort *ussrc = (GLushort *) src;
- for (j=0;j<width;j++) {
- GLushort p = ussrc[j];
- *dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* red */
- *dst++ = ((p >> 5) & 0x3f) * (1.0F / 63.0F); /* green */
- *dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* blue */
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- {
- GLushort *ussrc = (GLushort *) src;
- for (j=0;j<width;j++) {
- GLushort p = ussrc[j];
- *dst++ = ((p >> 12) ) * (1.0F / 15.0F); /* red */
- *dst++ = ((p >> 8) & 0xf) * (1.0F / 15.0F); /* green */
- *dst++ = ((p >> 4) & 0xf) * (1.0F / 15.0F); /* blue */
- *dst++ = ((p ) & 0xf) * (1.0F / 15.0F); /* alpha */
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- {
- GLushort *ussrc = (GLushort *) src;
- for (j=0;j<width;j++) {
- GLushort p = ussrc[j];
- *dst++ = ((p ) & 0xf) * (1.0F / 15.0F); /* red */
- *dst++ = ((p >> 4) & 0xf) * (1.0F / 15.0F); /* green */
- *dst++ = ((p >> 8) & 0xf) * (1.0F / 15.0F); /* blue */
- *dst++ = ((p >> 12) ) * (1.0F / 15.0F); /* alpha */
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- {
- GLushort *ussrc = (GLushort *) src;
- for (j=0;j<width;j++) {
- GLushort p = ussrc[j];
- *dst++ = ((p >> 11) ) * (1.0F / 31.0F); /* red */
- *dst++ = ((p >> 6) & 0x1f) * (1.0F / 31.0F); /* green */
- *dst++ = ((p >> 1) & 0x1f) * (1.0F / 31.0F); /* blue */
- *dst++ = ((p ) & 0x1) * (1.0F / 1.0F); /* alpha */
- }
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- {
- GLushort *ussrc = (GLushort *) src;
- for (j=0;j<width;j++) {
- GLushort p = ussrc[j];
- *dst++ = ((p ) & 0x1f) * (1.0F / 31.0F); /* red */
- *dst++ = ((p >> 5) & 0x1f) * (1.0F / 31.0F); /* green */
- *dst++ = ((p >> 10) & 0x1f) * (1.0F / 31.0F); /* blue */
- *dst++ = ((p >> 15) ) * (1.0F / 1.0F); /* alpha */
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- {
- GLuint *uisrc = (GLuint *) src;
- for (j=0;j<width;j++) {
- GLuint p = uisrc[j];
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- {
- GLuint *uisrc = (GLuint *) src;
- for (j=0;j<width;j++) {
- GLuint p = uisrc[j];
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
- *dst++ = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
- }
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- {
- GLuint *uisrc = (GLuint *) src;
- for (j=0;j<width;j++) {
- GLuint p = uisrc[j];
- *dst++ = ((p >> 22) ) * (1.0F / 1023.0F); /* r */
- *dst++ = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F); /* g */
- *dst++ = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F); /* b */
- *dst++ = ((p ) & 0x3 ) * (1.0F / 3.0F); /* a */
- }
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- {
- GLuint *uisrc = (GLuint *) src;
- for (j=0;j<width;j++) {
- GLuint p = uisrc[j];
- *dst++ = ((p ) & 0x3ff) * (1.0F / 1023.0F); /* r*/
- *dst++ = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F); /* g */
- *dst++ = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F); /* b */
- *dst++ = ((p >> 30) ) * (1.0F / 3.0F); /* a */
- }
- }
- break;
- default:
- gl_problem(ctx, "unpack_float_image type" );
- return image;
- }
- }
- }
-
- if (format == GL_BGR) {
- /* swap order of every float triplet from BGR to RGBA */
- GLfloat *buffer = (GLfloat *) image->Data;
- for (i=0; i<width*height*depth; i++) {
- GLfloat b = buffer[i*3+0];
- GLfloat r = buffer[i*3+2];
- buffer[i*3+0] = r;
- buffer[i*3+2] = b;
- }
- }
- else if (format == GL_BGRA) {
- /* swap order of every float quadruplet from BGRA to RGBA */
- GLfloat *buffer = (GLfloat *) image->Data;
- for (i=0; i<width*height*depth; i++) {
- GLfloat b = buffer[i*4+0];
- GLfloat r = buffer[i*4+2];
- buffer[i*4+0] = r;
- buffer[i*4+2] = b;
- }
- }
- else if (format == GL_ABGR_EXT) {
- /* swap order of every float quadruplet from ABGR to RGBA */
- GLfloat *buffer = (GLfloat *) image->Data;
- for (i=0; i<width*height*depth; i++) {
- GLfloat a = buffer[i*4+0];
- GLfloat b = buffer[i*4+1];
- GLfloat g = buffer[i*4+2];
- GLfloat r = buffer[i*4+3];
- buffer[i*4+0] = r;
- buffer[i*4+1] = g;
- buffer[i*4+2] = b;
- buffer[i*4+3] = a;
- }
- }
-
- return image;
- }
-
-
-
- /*
- * Unpack a bitmap image, using current glPixelStore parameters,
- * making a new gl_image.
- */
- struct gl_image *gl_unpack_bitmap( GLcontext *ctx,
- GLsizei width, GLsizei height,
- const GLubyte *bitmap,
- const struct gl_pixelstore_attrib *packing )
- {
- return gl_unpack_image( ctx, width, height,
- GL_COLOR_INDEX, GL_BITMAP, bitmap, packing );
- }
-
-
-
- /*
- * Unpack a 2-D image from user's buffer. Return pointer to new
- * gl_image struct.
- *
- * Input: width, height - size in pixels
- * format - format of incoming pixel data
- * type - datatype of incoming pixel data
- * pixels - pointer to unpacked image in user buffer
- */
- struct gl_image *gl_unpack_image( GLcontext *ctx,
- GLint width, GLint height,
- GLenum format, GLenum type,
- const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing )
- {
- return gl_unpack_image3D( ctx, width, height, 1,
- format, type, pixels, packing );
- }
-
-
-
- /*
- * Unpack a 1, 2 or 3-D image from user-supplied address, returning a
- * pointer to a new gl_image struct.
- * This function is always called by a higher-level unpack function such
- * as gl_unpack_texsubimage() or gl_unpack_bitmap().
- *
- * Input: width, height, depth - size in pixels
- * format - format of incoming pixel data
- * type - datatype of incoming pixel data
- * pixels - pointer to unpacked image.
- */
- struct gl_image *gl_unpack_image3D( GLcontext *ctx,
- GLint width, GLint height, GLint depth,
- GLenum format, GLenum type,
- const GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing)
- {
- if (width <= 0 || height <= 0 || depth <= 0) {
- return alloc_error_image(width, height, depth, format, type);
- }
-
- if (type==GL_BITMAP) {
- if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
- return alloc_error_image(width, height, depth, format, type);
- }
- else {
- return unpack_bitmap( format, width, height, pixels, packing );
- }
- }
- else if (format==GL_DEPTH_COMPONENT) {
- /* TODO: pack as GLdepth values (GLushort or GLuint) */
- return unpack_depth_image( ctx, type, width, height, pixels, packing );
- }
- else if (format==GL_STENCIL_INDEX) {
- /* TODO: pack as GLstencil (GLubyte or GLushort) */
- return unpack_stencil_image( ctx, type, width, height, pixels, packing );
- }
- else if (type==GL_UNSIGNED_BYTE) {
- /* upack, convert to GLubytes */
- return unpack_ubyte_image( width, height, depth, format, pixels, packing );
- }
- else {
- /* upack, convert to floats */
- return unpack_float_image( ctx, width, height, depth,
- format, type, pixels, packing );
- }
-
- /* never get here */
- /*return NULL;*/
- }
-
-
- /*
- * Apply pixel-transfer operations (scale, bias, mapping) to a single row
- * of a gl_image. Put resulting color components into result array.
- */
- void gl_scale_bias_map_image_data( const GLcontext *ctx,
- const struct gl_image *image,
- GLint row, GLubyte result[] )
- {
- GLint start, i;
-
- assert(ctx);
- assert(image);
- assert(result);
- assert(row >= 0);
-
- start = row * image->Width * image->Components;
-
- for (i=0; i < image->Width; i++) {
- GLint pos = start+i;
- GLfloat red, green, blue, alpha;
- if (image->Type == GL_UNSIGNED_BYTE) {
- const GLubyte *data = (GLubyte *) image->Data;
- switch (image->Format) {
- case GL_RED:
- red = data[pos] * (1.0F/255.0F);
- green = 0;
- blue = 0;
- alpha = 0;
- break;
- case GL_RGB:
- red = data[pos*3+0] * (1.0F/255.0F);
- green = data[pos*3+1] * (1.0F/255.0F);
- blue = data[pos*3+2] * (1.0F/255.0F);
- alpha = 0;
- break;
- default:
- gl_problem(ctx, "bad image format in gl_scale...image_data");
- return;
- }
- }
- else if (image->Type == GL_FLOAT) {
- const GLubyte *data = (GLubyte *) image->Data;
- switch (image->Format) {
- case GL_RED:
- red = data[pos];
- green = 0;
- blue = 0;
- alpha = 0;
- break;
- case GL_RGB:
- red = data[pos*3+0];
- green = data[pos*3+1];
- blue = data[pos*3+2];
- alpha = 0;
- break;
- default:
- gl_problem(ctx, "bad image format in gl_scale...image_data");
- return;
- }
- }
- else {
- gl_problem(ctx, "Bad image type in gl_scale_...image_data");
- return;
- }
-
- assert(red >= 0.0 && red <= 1.0);
- assert(green >= 0.0 && green <= 1.0);
- assert(blue >= 0.0 && blue <= 1.0);
- assert(alpha >= 0.0 && alpha <= 1.0);
-
- /*
- if (scale or bias) {
-
-
- }
- if (mapping) {
-
- }
- */
-
- result[i*4+0] = (GLubyte) (red * 255.0);
- result[i*4+1] = (GLubyte) (green * 255.0);
- result[i*4+2] = (GLubyte) (blue * 255.0);
- result[i*4+3] = (GLubyte) (alpha * 255.0);
- }
- }
-
-
-
- /*
- * Pack the given RGBA span into client memory at 'dest' address
- * in the given pixel format and type.
- * Optionally apply the enabled pixel transfer ops.
- * Pack into memory using the given packing params struct.
- * This is used by glReadPixels and glGetTexImage?D()
- * Input: ctx - the context
- * n - number of pixels in the span
- * rgba - the pixels
- * format - dest packing format
- * type - dest packing datatype
- * destination - destination packing address
- * packing - pixel packing parameters
- * applyTransferOps - apply scale/bias/lookup-table ops?
- */
- void gl_pack_rgba_span( const GLcontext *ctx,
- GLuint n, CONST GLubyte rgba[][4],
- GLenum format, GLenum type, GLvoid *destination,
- const struct gl_pixelstore_attrib *packing,
- GLboolean applyTransferOps )
- {
- /* Test for optimized case first */
- if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
- format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
- /* common simple case */
- MEMCPY( destination, rgba, n * 4 * sizeof(GLubyte) );
- }
- else if (!ctx->Pixel.ScaleOrBiasRGBA && !ctx->Pixel.MapColorFlag &&
- format == GL_RGB && type == GL_UNSIGNED_BYTE) {
- /* common simple case */
- GLint i;
- GLubyte *dest = (GLubyte *) destination;
- for (i = 0; i < n; i++) {
- dest[0] = rgba[i][RCOMP];
- dest[1] = rgba[i][GCOMP];
- dest[2] = rgba[i][BCOMP];
- dest += 3;
- }
- }
- else {
- GLfloat red[MAX_WIDTH], green[MAX_WIDTH], blue[MAX_WIDTH];
- GLfloat alpha[MAX_WIDTH], luminance[MAX_WIDTH];
- const GLfloat rscale = 1.0F / 255.0F;
- const GLfloat gscale = 1.0F / 255.0F;
- const GLfloat bscale = 1.0F / 255.0F;
- const GLfloat ascale = 1.0F / 255.0F;
- const GLint comps = gl_components_in_format(format);
- GLuint i;
-
- assert(n <= MAX_WIDTH);
-
- /* convert color components to floating point */
- for (i=0;i<n;i++) {
- red[i] = rgba[i][RCOMP] * rscale;
- green[i] = rgba[i][GCOMP] * gscale;
- blue[i] = rgba[i][BCOMP] * bscale;
- alpha[i] = rgba[i][ACOMP] * ascale;
- }
-
- /*
- * Apply scale, bias and lookup-tables if enabled.
- */
- if (applyTransferOps) {
- if (ctx->Pixel.ScaleOrBiasRGBA) {
- gl_scale_and_bias_color( ctx, n, red, green, blue, alpha );
- }
- if (ctx->Pixel.MapColorFlag) {
- gl_map_color( ctx, n, red, green, blue, alpha );
- }
- }
-
- if (format==GL_LUMINANCE || format==GL_LUMINANCE_ALPHA) {
- for (i=0;i<n;i++) {
- GLfloat sum = red[i] + green[i] + blue[i];
- luminance[i] = CLAMP( sum, 0.0F, 1.0F );
- }
- }
-
- /*
- * Pack/store the pixels. Ugh! Lots of cases!!!
- */
- switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(red[i]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(green[i]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(blue[i]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(alpha[i]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UBYTE(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
- dst[i*2+1] = FLOAT_TO_UBYTE(alpha[i]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UBYTE(red[i]);
- dst[i*3+1] = FLOAT_TO_UBYTE(green[i]);
- dst[i*3+2] = FLOAT_TO_UBYTE(blue[i]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UBYTE(red[i]);
- dst[i*4+1] = FLOAT_TO_UBYTE(green[i]);
- dst[i*4+2] = FLOAT_TO_UBYTE(blue[i]);
- dst[i*4+3] = FLOAT_TO_UBYTE(alpha[i]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UBYTE(blue[i]);
- dst[i*3+1] = FLOAT_TO_UBYTE(green[i]);
- dst[i*3+2] = FLOAT_TO_UBYTE(red[i]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UBYTE(blue[i]);
- dst[i*4+1] = FLOAT_TO_UBYTE(green[i]);
- dst[i*4+2] = FLOAT_TO_UBYTE(red[i]);
- dst[i*4+3] = FLOAT_TO_UBYTE(alpha[i]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UBYTE(alpha[i]);
- dst[i*4+1] = FLOAT_TO_UBYTE(blue[i]);
- dst[i*4+2] = FLOAT_TO_UBYTE(green[i]);
- dst[i*4+3] = FLOAT_TO_UBYTE(red[i]);
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- }
- break;
- case GL_BYTE:
- {
- GLbyte *dst = (GLbyte *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(red[i]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(green[i]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(blue[i]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(alpha[i]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_BYTE(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
- dst[i*2+1] = FLOAT_TO_BYTE(alpha[i]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_BYTE(red[i]);
- dst[i*3+1] = FLOAT_TO_BYTE(green[i]);
- dst[i*3+2] = FLOAT_TO_BYTE(blue[i]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_BYTE(red[i]);
- dst[i*4+1] = FLOAT_TO_BYTE(green[i]);
- dst[i*4+2] = FLOAT_TO_BYTE(blue[i]);
- dst[i*4+3] = FLOAT_TO_BYTE(alpha[i]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_BYTE(blue[i]);
- dst[i*3+1] = FLOAT_TO_BYTE(green[i]);
- dst[i*3+2] = FLOAT_TO_BYTE(red[i]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_BYTE(blue[i]);
- dst[i*4+1] = FLOAT_TO_BYTE(green[i]);
- dst[i*4+2] = FLOAT_TO_BYTE(red[i]);
- dst[i*4+3] = FLOAT_TO_BYTE(alpha[i]);
- }
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_BYTE(alpha[i]);
- dst[i*4+1] = FLOAT_TO_BYTE(blue[i]);
- dst[i*4+2] = FLOAT_TO_BYTE(green[i]);
- dst[i*4+3] = FLOAT_TO_BYTE(red[i]);
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLushort *dst = (GLushort *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(red[i]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(green[i]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(blue[i]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(alpha[i]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_USHORT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_USHORT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_USHORT(alpha[i]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_USHORT(red[i]);
- dst[i*3+1] = FLOAT_TO_USHORT(green[i]);
- dst[i*3+2] = FLOAT_TO_USHORT(blue[i]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_USHORT(red[i]);
- dst[i*4+1] = FLOAT_TO_USHORT(green[i]);
- dst[i*4+2] = FLOAT_TO_USHORT(blue[i]);
- dst[i*4+3] = FLOAT_TO_USHORT(alpha[i]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_USHORT(blue[i]);
- dst[i*3+1] = FLOAT_TO_USHORT(green[i]);
- dst[i*3+2] = FLOAT_TO_USHORT(red[i]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_USHORT(blue[i]);
- dst[i*4+1] = FLOAT_TO_USHORT(green[i]);
- dst[i*4+2] = FLOAT_TO_USHORT(red[i]);
- dst[i*4+3] = FLOAT_TO_USHORT(alpha[i]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_USHORT(alpha[i]);
- dst[i*4+1] = FLOAT_TO_USHORT(blue[i]);
- dst[i*4+2] = FLOAT_TO_USHORT(green[i]);
- dst[i*4+3] = FLOAT_TO_USHORT(red[i]);
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- if (packing->SwapBytes) {
- gl_swap2( (GLushort *) dst, n * comps);
- }
- }
- break;
- case GL_SHORT:
- {
- GLshort *dst = (GLshort *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(red[i]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(green[i]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(blue[i]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(alpha[i]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_SHORT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_SHORT(alpha[i]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_SHORT(red[i]);
- dst[i*3+1] = FLOAT_TO_SHORT(green[i]);
- dst[i*3+2] = FLOAT_TO_SHORT(blue[i]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_SHORT(red[i]);
- dst[i*4+1] = FLOAT_TO_SHORT(green[i]);
- dst[i*4+2] = FLOAT_TO_SHORT(blue[i]);
- dst[i*4+3] = FLOAT_TO_SHORT(alpha[i]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_SHORT(blue[i]);
- dst[i*3+1] = FLOAT_TO_SHORT(green[i]);
- dst[i*3+2] = FLOAT_TO_SHORT(red[i]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_SHORT(blue[i]);
- dst[i*4+1] = FLOAT_TO_SHORT(green[i]);
- dst[i*4+2] = FLOAT_TO_SHORT(red[i]);
- dst[i*4+3] = FLOAT_TO_SHORT(alpha[i]);
- }
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_SHORT(alpha[i]);
- dst[i*4+1] = FLOAT_TO_SHORT(blue[i]);
- dst[i*4+2] = FLOAT_TO_SHORT(green[i]);
- dst[i*4+3] = FLOAT_TO_SHORT(red[i]);
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- if (packing->SwapBytes) {
- gl_swap2( (GLushort *) dst, n * comps );
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint *dst = (GLuint *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(red[i]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(green[i]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(blue[i]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(alpha[i]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_UINT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_UINT(alpha[i]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UINT(red[i]);
- dst[i*3+1] = FLOAT_TO_UINT(green[i]);
- dst[i*3+2] = FLOAT_TO_UINT(blue[i]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UINT(red[i]);
- dst[i*4+1] = FLOAT_TO_UINT(green[i]);
- dst[i*4+2] = FLOAT_TO_UINT(blue[i]);
- dst[i*4+3] = FLOAT_TO_UINT(alpha[i]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_UINT(blue[i]);
- dst[i*3+1] = FLOAT_TO_UINT(green[i]);
- dst[i*3+2] = FLOAT_TO_UINT(red[i]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UINT(blue[i]);
- dst[i*4+1] = FLOAT_TO_UINT(green[i]);
- dst[i*4+2] = FLOAT_TO_UINT(red[i]);
- dst[i*4+3] = FLOAT_TO_UINT(alpha[i]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_UINT(alpha[i]);
- dst[i*4+1] = FLOAT_TO_UINT(blue[i]);
- dst[i*4+2] = FLOAT_TO_UINT(green[i]);
- dst[i*4+3] = FLOAT_TO_UINT(red[i]);
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- if (packing->SwapBytes) {
- gl_swap4( (GLuint *) dst, n * comps );
- }
- }
- break;
- case GL_INT:
- {
- GLint *dst = (GLint *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(red[i]);
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(green[i]);
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(blue[i]);
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(alpha[i]);
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = FLOAT_TO_INT(luminance[i]);
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
- dst[i*2+1] = FLOAT_TO_INT(alpha[i]);
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_INT(red[i]);
- dst[i*3+1] = FLOAT_TO_INT(green[i]);
- dst[i*3+2] = FLOAT_TO_INT(blue[i]);
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_INT(red[i]);
- dst[i*4+1] = FLOAT_TO_INT(green[i]);
- dst[i*4+2] = FLOAT_TO_INT(blue[i]);
- dst[i*4+3] = FLOAT_TO_INT(alpha[i]);
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = FLOAT_TO_INT(blue[i]);
- dst[i*3+1] = FLOAT_TO_INT(green[i]);
- dst[i*3+2] = FLOAT_TO_INT(red[i]);
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_INT(blue[i]);
- dst[i*4+1] = FLOAT_TO_INT(green[i]);
- dst[i*4+2] = FLOAT_TO_INT(red[i]);
- dst[i*4+3] = FLOAT_TO_INT(alpha[i]);
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = FLOAT_TO_INT(alpha[i]);
- dst[i*4+1] = FLOAT_TO_INT(blue[i]);
- dst[i*4+2] = FLOAT_TO_INT(green[i]);
- dst[i*4+3] = FLOAT_TO_INT(red[i]);
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- if (packing->SwapBytes) {
- gl_swap4( (GLuint *) dst, n * comps );
- }
- }
- break;
- case GL_FLOAT:
- {
- GLfloat *dst = (GLfloat *) destination;
- switch (format) {
- case GL_RED:
- for (i=0;i<n;i++)
- dst[i] = red[i];
- break;
- case GL_GREEN:
- for (i=0;i<n;i++)
- dst[i] = green[i];
- break;
- case GL_BLUE:
- for (i=0;i<n;i++)
- dst[i] = blue[i];
- break;
- case GL_ALPHA:
- for (i=0;i<n;i++)
- dst[i] = alpha[i];
- break;
- case GL_LUMINANCE:
- for (i=0;i<n;i++)
- dst[i] = luminance[i];
- break;
- case GL_LUMINANCE_ALPHA:
- for (i=0;i<n;i++) {
- dst[i*2+0] = luminance[i];
- dst[i*2+1] = alpha[i];
- }
- break;
- case GL_RGB:
- for (i=0;i<n;i++) {
- dst[i*3+0] = red[i];
- dst[i*3+1] = green[i];
- dst[i*3+2] = blue[i];
- }
- break;
- case GL_RGBA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = red[i];
- dst[i*4+1] = green[i];
- dst[i*4+2] = blue[i];
- dst[i*4+3] = alpha[i];
- }
- break;
- case GL_BGR:
- for (i=0;i<n;i++) {
- dst[i*3+0] = blue[i];
- dst[i*3+1] = green[i];
- dst[i*3+2] = red[i];
- }
- break;
- case GL_BGRA:
- for (i=0;i<n;i++) {
- dst[i*4+0] = blue[i];
- dst[i*4+1] = green[i];
- dst[i*4+2] = red[i];
- dst[i*4+3] = alpha[i];
- }
- break;
- case GL_ABGR_EXT:
- for (i=0;i<n;i++) {
- dst[i*4+0] = alpha[i];
- dst[i*4+1] = blue[i];
- dst[i*4+2] = green[i];
- dst[i*4+3] = red[i];
- }
- break;
- default:
- gl_problem(ctx, "bad format in gl_pack_rgba_span\n");
- }
- if (packing->SwapBytes) {
- gl_swap4( (GLuint *) dst, n * comps );
- }
- }
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- if (format == GL_RGB) {
- GLubyte *dst = (GLubyte *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 7.0F)) << 5)
- | (((GLint) (green[i] * 7.0F)) << 2)
- | (((GLint) (blue[i] * 3.0F)) );
- }
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- if (format == GL_RGB) {
- GLubyte *dst = (GLubyte *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 7.0F)) )
- | (((GLint) (green[i] * 7.0F)) << 3)
- | (((GLint) (blue[i] * 3.0F)) << 5);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 31.0F)) << 11)
- | (((GLint) (green[i] * 63.0F)) << 5)
- | (((GLint) (blue[i] * 31.0F)) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 31.0F)) )
- | (((GLint) (green[i] * 63.0F)) << 5)
- | (((GLint) (blue[i] * 31.0F)) << 11);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 15.0F)) << 12)
- | (((GLint) (green[i] * 15.0F)) << 8)
- | (((GLint) (blue[i] * 15.0F)) << 4)
- | (((GLint) (alpha[i] * 15.0F)) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 15.0F)) )
- | (((GLint) (green[i] * 15.0F)) << 4)
- | (((GLint) (blue[i] * 15.0F)) << 8)
- | (((GLint) (alpha[i] * 15.0F)) << 12);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 31.0F)) << 11)
- | (((GLint) (green[i] * 31.0F)) << 6)
- | (((GLint) (blue[i] * 31.0F)) << 1)
- | (((GLint) (alpha[i] * 1.0F)) );
- }
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (format == GL_RGB) {
- GLushort *dst = (GLushort *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLint) (red[i] * 31.0F)) )
- | (((GLint) (green[i] * 31.0F)) << 5)
- | (((GLint) (blue[i] * 31.0F)) << 10)
- | (((GLint) (alpha[i] * 1.0F)) << 15);
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (red[i] * 255.0F)) << 24)
- | (((GLuint) (green[i] * 255.0F)) << 16)
- | (((GLuint) (blue[i] * 255.0F)) << 8)
- | (((GLuint) (alpha[i] * 255.0F)) );
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (blue[i] * 255.0F)) << 24)
- | (((GLuint) (green[i] * 255.0F)) << 16)
- | (((GLuint) (red[i] * 255.0F)) << 8)
- | (((GLuint) (alpha[i] * 255.0F)) );
- }
- }
- else if (format == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (alpha[i] * 255.0F)) << 24)
- | (((GLuint) (blue[i] * 255.0F)) << 16)
- | (((GLuint) (green[i] * 255.0F)) << 8)
- | (((GLuint) (red[i] * 255.0F)) );
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (red[i] * 255.0F)) )
- | (((GLuint) (green[i] * 255.0F)) << 8)
- | (((GLuint) (blue[i] * 255.0F)) << 16)
- | (((GLuint) (alpha[i] * 255.0F)) << 24);
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (blue[i] * 255.0F)) )
- | (((GLuint) (green[i] * 255.0F)) << 8)
- | (((GLuint) (red[i] * 255.0F)) << 16)
- | (((GLuint) (alpha[i] * 255.0F)) << 24);
- }
- }
- else if (format == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (alpha[i] * 255.0F)) )
- | (((GLuint) (blue[i] * 255.0F)) << 8)
- | (((GLuint) (green[i] * 255.0F)) << 16)
- | (((GLuint) (red[i] * 255.0F)) << 24);
- }
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (red[i] * 1023.0F)) << 22)
- | (((GLuint) (green[i] * 1023.0F)) << 12)
- | (((GLuint) (blue[i] * 1023.0F)) << 2)
- | (((GLuint) (alpha[i] * 3.0F)) );
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (blue[i] * 1023.0F)) << 22)
- | (((GLuint) (green[i] * 1023.0F)) << 12)
- | (((GLuint) (red[i] * 1023.0F)) << 2)
- | (((GLuint) (alpha[i] * 3.0F)) );
- }
- }
- else if (format == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (alpha[i] * 1023.0F)) << 22)
- | (((GLuint) (blue[i] * 1023.0F)) << 12)
- | (((GLuint) (green[i] * 1023.0F)) << 2)
- | (((GLuint) (red[i] * 3.0F)) );
- }
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (format == GL_RGBA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (red[i] * 1023.0F)) )
- | (((GLuint) (green[i] * 1023.0F)) << 10)
- | (((GLuint) (blue[i] * 1023.0F)) << 20)
- | (((GLuint) (alpha[i] * 3.0F)) << 30);
- }
- }
- else if (format == GL_BGRA) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (blue[i] * 1023.0F)) )
- | (((GLuint) (green[i] * 1023.0F)) << 10)
- | (((GLuint) (red[i] * 1023.0F)) << 20)
- | (((GLuint) (alpha[i] * 3.0F)) << 30);
- }
- }
- else if (format == GL_ABGR_EXT) {
- GLuint *dst = (GLuint *) destination;
- for (i=0;i<n;i++) {
- dst[i] = (((GLuint) (alpha[i] * 1023.0F)) )
- | (((GLuint) (blue[i] * 1023.0F)) << 10)
- | (((GLuint) (green[i] * 1023.0F)) << 20)
- | (((GLuint) (red[i] * 3.0F)) << 30);
- }
- }
- break;
- default:
- gl_problem( ctx, "bad type in gl_pack_rgba_span" );
- }
- }
- }
-
-
-
- /*
- * New (3.3) functions
- */
-
- #define SWAP2BYTE(VALUE) \
- { \
- GLubyte *bytes = (GLubyte *) &(VALUE); \
- GLubyte tmp = bytes[0]; \
- bytes[0] = bytes[1]; \
- bytes[1] = tmp; \
- }
-
- #define SWAP4BYTE(VALUE) \
- { \
- GLubyte *bytes = (GLubyte *) &(VALUE); \
- GLubyte tmp = bytes[0]; \
- bytes[0] = bytes[3]; \
- bytes[3] = tmp; \
- tmp = bytes[1]; \
- bytes[1] = bytes[2]; \
- bytes[2] = tmp; \
- }
-
-
- static void
- extract_uint_indexes(GLuint n, GLuint indexes[],
- GLenum srcFormat, GLenum srcType, const GLvoid *src,
- const struct gl_pixelstore_attrib *unpack )
- {
- assert(srcFormat == GL_COLOR_INDEX);
-
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_FLOAT);
-
- switch (srcType) {
- case GL_BITMAP:
- {
- GLubyte *ubsrc = (GLubyte *) src;
- if (unpack->LsbFirst) {
- GLubyte mask = 1 << (unpack->SkipPixels & 0x7);
- GLuint i;
- for (i = 0; i < n; i++) {
- indexes[i] = (*ubsrc & mask) ? 1 : 0;
- if (mask == 128) {
- mask = 1;
- ubsrc++;
- }
- else {
- mask = mask << 1;
- }
- }
- }
- else {
- GLubyte mask = 128 >> (unpack->SkipPixels & 0x7);
- GLuint i;
- for (i = 0; i < n; i++) {
- indexes[i] = (*ubsrc & mask) ? 1 : 0;
- if (mask == 1) {
- mask = 128;
- ubsrc++;
- }
- else {
- mask = mask >> 1;
- }
- }
- }
- }
- break;
- case GL_UNSIGNED_BYTE:
- {
- GLuint i;
- const GLubyte *s = (const GLubyte *) src;
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- break;
- case GL_BYTE:
- {
- GLuint i;
- const GLbyte *s = (const GLbyte *) src;
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLuint i;
- const GLushort *s = (const GLushort *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLushort value = s[i];
- SWAP2BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_SHORT:
- {
- GLuint i;
- const GLshort *s = (const GLshort *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLshort value = s[i];
- SWAP2BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_UNSIGNED_INT:
- {
- GLuint i;
- const GLuint *s = (const GLuint *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLuint value = s[i];
- SWAP4BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_INT:
- {
- GLuint i;
- const GLint *s = (const GLint *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLint value = s[i];
- SWAP4BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- case GL_FLOAT:
- {
- GLuint i;
- const GLfloat *s = (const GLfloat *) src;
- if (unpack->SwapBytes) {
- for (i = 0; i < n; i++) {
- GLfloat value = s[i];
- SWAP4BYTE(value);
- indexes[i] = value;
- }
- }
- else {
- for (i = 0; i < n; i++)
- indexes[i] = s[i];
- }
- }
- break;
- default:
- gl_problem(NULL, "bad srcType in extract_uint_indexes");
- return;
- }
- }
-
-
-
- /*
- * This function extracts floating point RGBA values from arbitrary
- * image data. srcFormat and srcType are the format and type parameters
- * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
- *
- * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
- * implements the "Conversion to floating point", "Conversion to RGB",
- * and "Final Expansion to RGBA" operations.
- *
- * Args: n - number of pixels
- * rgba - output colors
- * srcFormat - format of incoming data
- * srcType - datatype of incoming data
- * src - source data pointer
- * swapBytes - perform byteswapping of incoming data?
- */
- static void
- extract_float_rgba(GLuint n, GLfloat rgba[][4],
- GLenum srcFormat, GLenum srcType, const GLvoid *src,
- GLboolean swapBytes)
- {
- GLint redIndex, greenIndex, blueIndex, alphaIndex;
- GLint stride;
- GLint rComp, bComp, gComp, aComp;
-
- if (0)
- {
- int i;
- for (i = 0; i<n;i++) {
- rgba[i][0] = rgba[i][1] = rgba[i][2] = rgba[i][3] = 0;
- }
- return;
- }
-
-
- ASSERT(srcFormat == GL_RED ||
- srcFormat == GL_GREEN ||
- srcFormat == GL_BLUE ||
- srcFormat == GL_ALPHA ||
- srcFormat == GL_LUMINANCE ||
- srcFormat == GL_LUMINANCE_ALPHA ||
- srcFormat == GL_INTENSITY ||
- srcFormat == GL_RGB ||
- srcFormat == GL_BGR ||
- srcFormat == GL_RGBA ||
- srcFormat == GL_BGRA ||
- srcFormat == GL_ABGR_EXT);
-
- ASSERT(srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_FLOAT ||
- srcType == GL_UNSIGNED_BYTE_3_3_2 ||
- srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
- srcType == GL_UNSIGNED_SHORT_5_6_5 ||
- srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
- srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- srcType == GL_UNSIGNED_INT_8_8_8_8 ||
- srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
- srcType == GL_UNSIGNED_INT_10_10_10_2 ||
- srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
- switch (srcFormat) {
- case GL_RED:
- redIndex = 0;
- greenIndex = blueIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_GREEN:
- greenIndex = 0;
- redIndex = blueIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_BLUE:
- blueIndex = 0;
- redIndex = greenIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_ALPHA:
- redIndex = greenIndex = blueIndex = -1;
- alphaIndex = 0;
- stride = 1;
- break;
- case GL_LUMINANCE:
- redIndex = greenIndex = blueIndex = 0;
- alphaIndex = -1;
- stride = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- redIndex = greenIndex = blueIndex = 0;
- alphaIndex = 1;
- stride = 2;
- break;
- case GL_INTENSITY:
- redIndex = 0;
- greenIndex = blueIndex = alphaIndex = -1;
- stride = 1;
- break;
- case GL_RGB:
- redIndex = 0;
- greenIndex = 1;
- blueIndex = 2;
- alphaIndex = -1;
- stride = 3;
- break;
- case GL_BGR:
- redIndex = 2;
- greenIndex = 1;
- blueIndex = 0;
- alphaIndex = -1;
- stride = 3;
- break;
- case GL_RGBA:
- redIndex = 0;
- greenIndex = 1;
- blueIndex = 2;
- alphaIndex = 3;
- rComp = 0;
- gComp = 1;
- bComp = 2;
- aComp = 3;
- stride = 4;
- break;
- case GL_BGRA:
- redIndex = 2;
- greenIndex = 1;
- blueIndex = 0;
- alphaIndex = 3;
- rComp = 2;
- gComp = 1;
- bComp = 0;
- aComp = 3;
- stride = 4;
- break;
- case GL_ABGR_EXT:
- redIndex = 3;
- greenIndex = 2;
- blueIndex = 1;
- alphaIndex = 0;
- rComp = 3;
- gComp = 2;
- bComp = 1;
- aComp = 0;
- stride = 4;
- break;
- default:
- gl_problem(NULL, "bad srcFormat in extract float data");
- return;
- }
-
- assert(redIndex >= -1 && redIndex <= 4);
- assert(greenIndex >= -1 && greenIndex <= 4);
- assert(blueIndex >= -1 && blueIndex <= 4);
- assert(alphaIndex >= -1 && alphaIndex <= 4);
-
- #define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
- if ((INDEX) < 0) { \
- GLuint i; \
- for (i = 0; i < n; i++) { \
- rgba[i][CHANNEL] = DEFAULT; \
- } \
- } \
- else if (swapBytes) { \
- const TYPE *s = (const TYPE *) src; \
- GLuint i; \
- for (i = 0; i < n; i++) { \
- TYPE value = s[INDEX]; \
- if (sizeof(TYPE) == 2) { \
- SWAP2BYTE(value); \
- } \
- else if (sizeof(TYPE) == 4) { \
- SWAP4BYTE(value); \
- } \
- rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
- s += stride; \
- } \
- } \
- else { \
- const TYPE *s = (const TYPE *) src; \
- GLuint i; \
- for (i = 0; i < n; i++) { \
- rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
- s += stride; \
- } \
- }
-
- switch (srcType) {
- case GL_UNSIGNED_BYTE:
- PROCESS(redIndex, RCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT);
- break;
- case GL_BYTE:
- PROCESS(redIndex, RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT);
- break;
- case GL_UNSIGNED_SHORT:
- PROCESS(redIndex, RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT);
- break;
- case GL_SHORT:
- PROCESS(redIndex, RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT);
- break;
- case GL_UNSIGNED_INT:
- PROCESS(redIndex, RCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT);
- break;
- case GL_INT:
- PROCESS(redIndex, RCOMP, 0.0F, GLint, INT_TO_FLOAT);
- PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT);
- PROCESS(blueIndex, BCOMP, 0.0F, GLint, INT_TO_FLOAT);
- PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT);
- break;
- case GL_FLOAT:
- PROCESS(redIndex, RCOMP, 0.0F, GLfloat, (GLfloat));
- PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat));
- PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat));
- PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
- break;
- case GL_UNSIGNED_BYTE_3_3_2:
- {
- const GLubyte *ubsrc = (const GLubyte *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLubyte p = ubsrc[i];
- rgba[i][RCOMP] = ((p >> 5) ) * (1.0F / 7.0F);
- rgba[i][GCOMP] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
- rgba[i][BCOMP] = ((p ) & 0x3) * (1.0F / 3.0F);
- rgba[i][ACOMP] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- {
- const GLubyte *ubsrc = (const GLubyte *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLubyte p = ubsrc[i];
- rgba[i][RCOMP] = ((p ) & 0x7) * (1.0F / 7.0F);
- rgba[i][GCOMP] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
- rgba[i][BCOMP] = ((p >> 6) ) * (1.0F / 3.0F);
- rgba[i][ACOMP] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5:
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
- rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][ACOMP] = 1.0F;
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4:
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
- rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
- rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
- rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
- rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
- rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
- rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
- rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
- rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
- rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
- rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
- rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
- rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_5_5_5_1:
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
- rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
- rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
- rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
- rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
- rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
- }
- }
- break;
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- if (swapBytes) {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- SWAP2BYTE(p);
- rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
- rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
- rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
- }
- }
- else {
- const GLushort *ussrc = (const GLushort *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLushort p = ussrc[i];
- rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
- rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
- rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
- rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8:
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
- rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
- rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
- rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
- rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
- rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
- rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
- }
- }
- break;
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
- rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
- rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
- rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p ) & 0xff);
- rgba[i][gComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 8) & 0xff);
- rgba[i][bComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 16) & 0xff);
- rgba[i][aComp] = UBYTE_COLOR_TO_FLOAT_COLOR((p >> 24) );
- }
- }
- break;
- case GL_UNSIGNED_INT_10_10_10_2:
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- SWAP4BYTE(p);
- rgba[i][rComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
- rgba[i][gComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][bComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][aComp] = ((p >> 22) ) * (1.0F / 1023.0F);
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
- rgba[i][gComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][bComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][aComp] = ((p >> 22) ) * (1.0F / 1023.0F);
- }
- }
- break;
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- if (swapBytes) {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- SWAP4BYTE(p);
- rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
- }
- }
- else {
- const GLuint *uisrc = (const GLuint *) src;
- GLuint i;
- for (i = 0; i < n; i ++) {
- GLuint p = uisrc[i];
- rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
- rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
- }
- }
- break;
- default:
- gl_problem(NULL, "bad srcType in extract float data");
- break;
- }
- }
-
-
-
- /*
- * Unpack a row of color image data from a client buffer according to
- * the pixel unpacking parameters. Apply any enabled pixel transfer
- * ops (PixelMap, scale/bias) if the applyTransferOps flag is enabled.
- * Return GLubyte values in the specified dest image format.
- * This is (or will be) used by glDrawPixels and glTexImage?D().
- * Input: ctx - the context
- * n - number of pixels in the span
- * dstFormat - format of destination color array
- * dest - the destination color array
- * srcFormat - source image format
- * srcType - source image datatype
- * source - source image pointer
- * unpacking - pixel unpacking parameters
- * applyTransferOps - apply scale/bias/lookup-table ops?
- *
- * XXX perhaps expand this to process whole images someday.
- */
- void
- _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
- GLuint n, GLenum dstFormat, GLubyte dest[],
- GLenum srcFormat, GLenum srcType,
- const GLvoid *source,
- const struct gl_pixelstore_attrib *unpacking,
- GLboolean applyTransferOps )
- {
- ASSERT(dstFormat == GL_ALPHA ||
- dstFormat == GL_LUMINANCE ||
- dstFormat == GL_LUMINANCE_ALPHA ||
- dstFormat == GL_INTENSITY ||
- dstFormat == GL_RGB ||
- dstFormat == GL_RGBA ||
- dstFormat == GL_COLOR_INDEX);
-
- ASSERT(srcFormat == GL_RED ||
- srcFormat == GL_GREEN ||
- srcFormat == GL_BLUE ||
- srcFormat == GL_ALPHA ||
- srcFormat == GL_LUMINANCE ||
- srcFormat == GL_LUMINANCE_ALPHA ||
- srcFormat == GL_INTENSITY ||
- srcFormat == GL_RGB ||
- srcFormat == GL_BGR ||
- srcFormat == GL_RGBA ||
- srcFormat == GL_BGRA ||
- srcFormat == GL_ABGR_EXT ||
- srcFormat == GL_COLOR_INDEX);
-
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_FLOAT ||
- srcType == GL_UNSIGNED_BYTE_3_3_2 ||
- srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
- srcType == GL_UNSIGNED_SHORT_5_6_5 ||
- srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
- srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
- srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
- srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
- srcType == GL_UNSIGNED_INT_8_8_8_8 ||
- srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
- srcType == GL_UNSIGNED_INT_10_10_10_2 ||
- srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
-
- /* this is intended for RGBA mode */
- ASSERT(ctx->Visual->RGBAflag);
-
- applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA ||
- ctx->Pixel.MapColorFlag);
-
- /* Try simple cases first */
- if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE) {
- if (dstFormat == GL_RGBA) {
- if (srcFormat == GL_RGBA) {
- MEMCPY( dest, source, n * 4 * sizeof(GLubyte) );
- return;
- }
- else if (srcFormat == GL_RGB) {
- GLuint i;
- const GLubyte *src = (const GLubyte *) source;
- GLubyte *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = src[0];
- dst[1] = src[1];
- dst[2] = src[2];
- dst[3] = 255;
- src += 3;
- dst += 4;
- }
- return;
- }
- }
- else if (dstFormat == GL_RGB) {
- if (srcFormat == GL_RGB) {
- MEMCPY( dest, source, n * 3 * sizeof(GLubyte) );
- return;
- }
- else if (srcFormat == GL_RGBA) {
- GLuint i;
- const GLubyte *src = (const GLubyte *) source;
- GLubyte *dst = dest;
- for (i = 0; i < n; i++) {
- dst[0] = src[0];
- dst[1] = src[1];
- dst[2] = src[2];
- src += 4;
- dst += 3;
- }
- return;
- }
- }
- else if (dstFormat == srcFormat) {
- GLint comps = gl_components_in_format(srcFormat);
- assert(comps > 0);
- MEMCPY( dest, source, n * comps * sizeof(GLubyte) );
- return;
- }
- }
-
-
- {
- /* general solution */
- GLfloat rgba[MAX_WIDTH][4];
- GLint dstComponents;
- GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
- GLint dstLuminanceIndex, dstIntensityIndex;
-
- dstComponents = gl_components_in_format( dstFormat );
- /* source & dest image formats should have been error checked by now */
- assert(dstComponents > 0);
-
- /*
- * Extract image data and convert to RGBA floats
- */
- assert(n <= MAX_WIDTH);
- if (srcFormat == GL_COLOR_INDEX) {
- GLuint indexes[MAX_WIDTH];
- extract_uint_indexes(n, indexes, srcFormat, srcType, source,
- unpacking);
-
- /* shift and offset indexes */
- gl_shift_and_offset_ci(ctx, n, indexes);
-
- if (dstFormat == GL_COLOR_INDEX) {
- if (applyTransferOps) {
- if (ctx->Pixel.MapColorFlag) {
- /* Apply lookup table */
- gl_map_ci(ctx, n, indexes);
- }
-
- if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
-
- }
- }
-
- /* convert to GLubyte and return */
- {
- GLuint i;
- for (i = 0; i < n; i++) {
- dest[i] = (GLubyte) (indexes[i] & 0xff);
- }
- }
- }
- else {
- /* Convert indexes to RGBA */
- gl_map_ci_to_rgba_float(ctx, n, indexes, rgba);
- }
- }
- else {
- extract_float_rgba(n, rgba, srcFormat, srcType, source,
- unpacking->SwapBytes);
-
- if (applyTransferOps) {
- /* scale and bias colors */
- gl_scale_and_bias_rgba_float(ctx, n, rgba);
-
- /* color table lookup */
- if (ctx->Pixel.MapColorFlag) {
- gl_map_rgba_float(ctx, n, rgba);
- }
- }
- }
-
-
- /*
- * XXX This is where more color table lookups, convolution,
- * histograms, minmax, color matrix, etc would take place if
- * implemented.
- * See figure 3.7 in the OpenGL 1.2 specification for more info.
- */
-
-
- /* clamp to [0,1] */
- {
- GLuint i;
- for (i = 0; i < n; i++) {
- rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
- rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
- rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
- rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
- }
- }
-
- /* Now determine which color channels we need to produce.
- * And determine the dest index (offset) within each color tuple.
- */
- switch (dstFormat) {
- case GL_ALPHA:
- dstAlphaIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
- dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_LUMINANCE:
- dstLuminanceIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
- dstIntensityIndex = -1;
- break;
- case GL_LUMINANCE_ALPHA:
- dstLuminanceIndex = 0;
- dstAlphaIndex = 1;
- dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
- dstIntensityIndex = -1;
- break;
- case GL_INTENSITY:
- dstIntensityIndex = 0;
- dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
- dstLuminanceIndex = -1;
- break;
- case GL_RGB:
- dstRedIndex = 0;
- dstGreenIndex = 1;
- dstBlueIndex = 2;
- dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_RGBA:
- dstRedIndex = 0;
- dstGreenIndex = 1;
- dstBlueIndex = 2;
- dstAlphaIndex = 3;
- dstLuminanceIndex = dstIntensityIndex = -1;
- break;
- case GL_COLOR_INDEX:
- assert(0);
- break;
- default:
- gl_problem(ctx, "bad dstFormat in _mesa_unpack_ubyte_span()");
- }
-
-
- /* Now return the GLubyte data in the requested dstFormat */
- if (dstRedIndex >= 0) {
- GLubyte *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstRedIndex] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstGreenIndex >= 0) {
- GLubyte *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstGreenIndex] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstBlueIndex >= 0) {
- GLubyte *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstBlueIndex] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstAlphaIndex >= 0) {
- GLubyte *dst = dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[dstAlphaIndex] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
- dst += dstComponents;
- }
- }
-
- if (dstIntensityIndex >= 0) {
- GLubyte *dst = dest;
- GLuint i;
- assert(dstIntensityIndex == 0);
- assert(dstComponents == 1);
- for (i = 0; i < n; i++) {
- /* Intensity comes from red channel */
- dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- }
- }
-
- if (dstLuminanceIndex >= 0) {
- GLubyte *dst = dest;
- GLuint i;
- assert(dstLuminanceIndex == 0);
- for (i = 0; i < n; i++) {
- /* Luminance comes from red channel */
- dst[0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
- dst += dstComponents;
- }
- }
- }
- }
-
-
-
- /*
- * Unpack a row of color index data from a client buffer according to
- * the pixel unpacking parameters. Apply pixel transfer ops if enabled
- * and applyTransferOps is true.
- * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
- *
- * Args: ctx - the context
- * n - number of pixels
- * dstType - destination datatype
- * dest - destination array
- * srcType - source pixel type
- * source - source data pointer
- * unpacking - pixel unpacking parameters
- * applyTransferOps - apply offset/bias/lookup ops?
- */
- void
- _mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
- GLenum dstType, GLvoid *dest,
- GLenum srcType, const GLvoid *source,
- const struct gl_pixelstore_attrib *unpacking,
- GLboolean applyTransferOps )
- {
- ASSERT(srcType == GL_BITMAP ||
- srcType == GL_UNSIGNED_BYTE ||
- srcType == GL_BYTE ||
- srcType == GL_UNSIGNED_SHORT ||
- srcType == GL_SHORT ||
- srcType == GL_UNSIGNED_INT ||
- srcType == GL_INT ||
- srcType == GL_FLOAT);
-
- ASSERT(dstType == GL_UNSIGNED_BYTE ||
- dstType == GL_UNSIGNED_SHORT ||
- dstType == GL_UNSIGNED_INT);
-
- applyTransferOps &= (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset || ctx->Pixel.MapColorFlag);
-
- /*
- * Try simple cases first
- */
- if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE
- && dstType == GL_UNSIGNED_BYTE) {
- MEMCPY(dest, source, n * sizeof(GLubyte));
- }
- else if (!applyTransferOps && srcType == GL_UNSIGNED_INT
- && dstType == GL_UNSIGNED_INT && !unpacking->SwapBytes) {
- MEMCPY(dest, source, n * sizeof(GLuint));
- }
- else {
- /*
- * general solution
- */
- GLuint indexes[MAX_WIDTH];
- assert(n <= MAX_WIDTH);
-
- extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
- unpacking);
-
- if (applyTransferOps) {
- if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset) {
- /* shift and offset indexes */
- gl_shift_and_offset_ci(ctx, n, indexes);
- }
-
- if (ctx->Pixel.MapColorFlag) {
- /* Apply lookup table */
- gl_map_ci(ctx, n, indexes);
- }
- }
-
- /* convert to dest type */
- switch (dstType) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *dst = (GLubyte *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLubyte) (indexes[i] & 0xff);
- }
- }
- break;
- case GL_UNSIGNED_SHORT:
- {
- GLuint *dst = (GLuint *) dest;
- GLuint i;
- for (i = 0; i < n; i++) {
- dst[i] = (GLushort) (indexes[i] & 0xffff);
- }
- }
- break;
- case GL_UNSIGNED_INT:
- MEMCPY(dest, indexes, n * sizeof(GLuint));
- break;
- default:
- gl_problem(ctx, "bad dstType in _mesa_unpack_index_span");
- }
- }
- }
-
-
- /*
- * Unpack image data. Apply byteswapping, byte flipping (bitmap).
- * Return all image data in a contiguous block.
- */
- void *
- _mesa_unpack_image( GLsizei width, GLsizei height, GLsizei depth,
- GLenum format, GLenum type, const GLvoid *pixels,
- const struct gl_pixelstore_attrib *unpack )
- {
- GLint bytesPerRow, compsPerRow;
- GLboolean flipBytes, swap2, swap4;
-
- if (!pixels)
- return NULL; /* not necessarily an error */
-
- if (width <= 0 || height <= 0 || depth <= 0)
- return NULL; /* generate error later */
-
- if (format == GL_BITMAP) {
- bytesPerRow = (width + 7) >> 3;
- flipBytes = !unpack->LsbFirst;
- swap2 = swap4 = GL_FALSE;
- compsPerRow = 0;
- }
- else {
- const GLint bytesPerPixel = gl_bytes_per_pixel(format, type);
- const GLint components = gl_components_in_format(format);
- GLint bytesPerComp;
- if (bytesPerPixel <= 0 || components <= 0)
- return NULL; /* bad format or type. generate error later */
- bytesPerRow = bytesPerPixel * width;
- bytesPerComp = bytesPerPixel / components;
- flipBytes = GL_FALSE;
- swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
- swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
- compsPerRow = components * width;
- assert(compsPerRow >= width);
- }
-
- {
- GLubyte *destBuffer = MALLOC(bytesPerRow * height * depth);
- GLubyte *dst;
- GLint img, row;
- if (!destBuffer)
- return NULL; /* generate GL_OUT_OF_MEMORY later */
-
- dst = destBuffer;
- for (img = 0; img < depth; img++) {
- for (row = 0; row < height; row++) {
- const GLvoid *src = gl_pixel_addr_in_image(unpack, pixels,
- width, height, format, type, img, row, 0);
- MEMCPY(dst, src, bytesPerRow);
- /* byte flipping/swapping */
- if (flipBytes) {
- gl_flip_bytes((GLubyte *) dst, bytesPerRow);
- }
- else if (swap2) {
- gl_swap2((GLushort*) dst, compsPerRow);
- }
- else if (swap4) {
- gl_swap4((GLuint*) dst, compsPerRow);
- }
- dst += bytesPerRow;
- }
- }
- return destBuffer;
- }
- }
-